package com.example.dell.zyfypt_122zzy.fragment;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;


import com.example.dell.zyfypt_122zzy.R;
import com.example.dell.zyfypt_122zzy.adapter.ArticleAdapter;
import com.example.dell.zyfypt_122zzy.bean.ArticleBean;
import com.example.dell.zyfypt_122zzy.iface.ArticleListener;
import com.example.dell.zyfypt_122zzy.model.ArticleModel;

import java.util.List;

/**
 * Created by Neusoft on 2017/4/9.
 */


public class Fragment1 extends Fragment {
    private  TextView tvinfo;
    private View view=null;
    private Context context;
    private RecyclerView recyclerView;//recyclerView控件
    private LinearLayoutManager   layoutManager;//..的布局管理
    private ArticleAdapter myAdapter;//..的适配器

    private int page=1; // 代表页数，并初始化为1，代表第1页。
    private int lastVisibleItemPosition;//最后一条可见条目的位置

    private List<ArticleBean> list=null;//保存数据

    ArticleListener articleListener=new ArticleListener() {
        @Override
        public void onResponse(List<ArticleBean> beanList) {
            if(page==1)
            {
                list=beanList;
            }
            else {
                list.removeAll(beanList);
                list.addAll(beanList);
            }

            myAdapter.setlist(list);
            myAdapter.notifyDataSetChanged();//通知更新
        }

        @Override
        public void onFail(String msg) {
            Toast.makeText(context, "失败："+msg,Toast.LENGTH_SHORT).show();
        }
    };
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        context=getActivity();
        //动态加载Fragment1的布局文件
        view=inflater.inflate(R.layout.fragment1,container,false);
        //获取布局上的控件，注意通过view获取
        tvinfo=(TextView)view.findViewById(R.id.textView8);
        tvinfo.setText("博文");
        //注意Toast第一个参数上下文
        Toast.makeText(context, "加载ZYFYPT博文", Toast.LENGTH_SHORT).show();

        initRecyclerView();
//实例化Articlemodel,调用方法获取网络数据
        ArticleModel model=new ArticleModel();
        model.getResultList("article",page,"ghq59kta3ue93s9orboaer5uf3",articleListener);

        //返回动态生成的view
        return view;
    }
    //初始化RecyclerView
    private void initRecyclerView() {
        recyclerView=(RecyclerView)view.findViewById(R.id.recyclerView);
        //创建默认的线性布局
        layoutManager=new LinearLayoutManager(context);
        //设置布局管理器
        recyclerView.setLayoutManager(layoutManager);
        //固定每个item高度，提高性能
        recyclerView.setHasFixedSize(true);
        //获取数据
        //st=getData();
        //实例化Adapter
        myAdapter=new ArticleAdapter(context);
        myAdapter.setlist(list);
//传递数据
        //绑定recyclerview和adapter
        recyclerView.setAdapter(myAdapter);
        //以下为新增内容
        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                if (newState == RecyclerView.SCROLL_STATE_IDLE && lastVisibleItemPosition + 1 == list.size()) {
                    page += 1;
                    //再次实例化ArticleModel，调用方法获取网络数据，请求新一页数据
                    ArticleModel articleModel = new ArticleModel();
                    articleModel.getResultList("article", page, "ghq59kta3ue93s9orboaer5uf3", articleListener);
                }
            }

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();
                //滚动结束后将赋值为可见条目中最后一条位置
            }
        });
    }
}
